Cylinder honing and wiping device



July 18, 1939. G. BECK CYLINDER HONING AND WIPING DEVICE i Filed Dec. 6,1937 v E mk m .u W e ?A y w w M ///MV/ e u a, a a 1 ay x J e A m INPatented July 18, 1939 UNITED STATES PATENT OFFICE 9 Claims.

The object of this invention is to provide a novel form of device forsubjecting a cylinder to an abrasive and wiping treatment.

In honing a cylinder with any of the various grades of emery, or anymetal reducing abrasive, minute particles of the latter and of thecylinder metal collect on the cylinder wall and these particles must beremoved as they are obviously objectionable. Only a gentle wiping actionis effrcient in the performance of this function as a high pressurewiping action only serves to embed or anchor some of the particles inthe wall, especially those of minute size.

It is a feature of this invention to provide a wiping means that willexercise a Very gentle wiping action, preferably in following relationto the hone, so that where a plurality of hones is employed, this wipingaction will follow one hone and precede the next, thereby preventing thefollowing hone from grinding in or embedding previously loosenedparticles.

It is a further feature to provide a holding means or holder for'thehoning or emery bar that will also function to anchor a wiper so thatthe latter will function in close relation to the former.

A further feature consists in providing a resiliently sustained wiper ofa suitable fabric having some absorbent Capacity, the wiper initiallyextending radially beyond the abrasive bar and flexing upon engagementwith the cylinder wall so that as the bar wears down, additional areasof the wiper Will come into' effective service against the cylinderwall.

My invention is embodied in a centrally disposed propulsive mechanismadapted to rotate and also spread the abrasive bars against the cylinderwall, and by reason of the fact that my improved wipers are of the noveltype set forth,

I can equip all the bar holders with abrasive bars thereby stabilizingthe propulsive mechanism in self centered relation in the cylinderbecause of the uniform and equal pressure exerted on each of the bars.

The invention has many other ob-jects and features which will be morefully described in connection with the accompanying drawing and whichwill be more particularly pointed out in 50` and by the appended claims.

In the drawing:

Fig. 1 is a horizontal sectional view of Fig. 2, showing the devicespread in a relatively large size cylinder.

55 Fig. 2 is a sectional View on line 2--2 of Fig. 1,

showing the 'device in a relatively small size cylinder.

Fig. 3 is an enlarged sectional View on line 3--3 of Fig. 2, showing anabrasive bar in its holder and the relation of the wiper thereto.

Fig. 4 is a sectional view of the wiper detached from the holder, takenon line 4--4 of Fig. 5.

Fig. 5 is a View in side elevation of the wiper with parts broken away.

Fig. 6 is a fragmentary View similar to Fig. 3, 10 showing a modifiedform of wiper. u Fig. '7 is a View in side elevation of one of thetoggle or spreading bars.

Fig. 8 is an edge View showing how a spring held pivot pin may beshifted. 15

Fig. 9 is an end view of a modified form of spring sustainer for thewiper.

Like characters of reference designate similar parts throughout thedifferent figures of the drawing. 20

As illustrated, l designates the cylinder wall in Fig. 1, and 2, thesmaller diameter wall in Fig. 2, the different size cylinder showingsbeing used to show the device in different adjustments, otherwise thereare no other distinctions as the device 25 in both views is the same.

Reference will first be made to the propulsive and spreading mechanism.

A rotatively driven propulsive spindle is designated at 3 and may beconnected upwith any 30 suitable source of power, not shown, forrotating and advancing the same in the cylinder, the usual direction ofrotation being clockwise, as shown by the arrow in Fig. 1. The lower endof this driving spindle 3 is provided with four toggle 35 lugs 4,although more or less may be employed dependent upon the number of barholclers desired. Cam or toggle bars are pivoted at their lower ends tosaid lugs and as all the bars are identical in form and function, onlyone need be 40 described in detail.

The toggle or cam actuating spreading bar is of U-shaped cross section,the web being indicated at 5 and the fianges at 6, and the free edges 'Iof the latter are adapted for engagement with a cam to be presentlydescribed. The fianges 6 extend beyond the web 5 and form pivot lugs 8at the lower end for spanning lug 4, and are pivoted thereto at 9. Atthe upper end, the flanges form lugs n for engagement with bar holders,to be presently described. A pivot pin I I is suitably fixed at !2 tothe end of a strip spring I 3 that is secured by the pivot pin 9 to oneside of the bar, as shown in Figs. 7 and 8. This affords means forquickly and easily changing bar holders.

Threaded on spindle 3 is a cam sleeve |5 having a cam !6, the latterengaging the toggle bars to spread the same when adjusted on spindle 3in one direction, and serving to release said bars when adjusted inanother direction, as will be clear from Fig. 2.

Reference will next be made to the improved abrasive bar holders.

Said holders are generally indicated at IT, and as all are identical inform` and function, only one need be described in detail. Reerring toFigs. 2' and 3, it will be seen that the holders which in effect aremounts have a channel form and are longitudinally divided into lateralsections of identical shape and size, the two sections beingsubstantially coextensive in length with the honing bar which they grip.Each section has a base portion 18 and a slightly inwardly inclined bargrippng side portion !9, which jointly receive a honing bar 20, whichhas the form of a trapezum, the top and bottom faces being parallel andthe side faces converging, although this precise shape is not importantI will designate the upper face 2| as the honing or working face: of thebar, which may be of emery or any metal reducing abrasive.

Depending or extending from the bottom of the holder are lug` sections22 of the shape shown in Fig. 2, and to which the upper ends of thetoggle bars 5 are pivotally united by the spring held pivot pin ll,previously described. Due to this Construction the bar holders Il cantilt under spreading stress and automatically conform ,to the cylinderand render the mechanism self stable and self center-ing," as will laterappear.

Reference will next be made to my improved wipers and to the manner inwhich they are connected with the bar holders just described.

Said wipers are formed from a strip of suitable fabric of a lengthsubstantially equal to'` the length of one of the bars 20, the stripbeing'folded transversely of its length to form a wiping bight 23, andside portions 24 and 25. The width of the strip is such that when thesame is folded it will initially extend beyond the working face 2! ofbar 20, that is, when secured in position, as shown in Fig. 3. It willthus be seen that I provide a double thickness wiper strip, and inpractise I have very successfully used pool or billard table felt toform the wiper, as this material is not only absorbent but also thin andof great wearing efficiency, although other materials may be found ofequal eiiiciency.

My improved wiper is resiliently sustained, as shown, by a spring whichmay be made from a strip of clock-spring steel, and I have successfullyused steel of from one to two-thousandths gauge. A strip of this steel,substantially the size of the fabric strip, is folded upon itself toform, a bight 26 and sides or limbs 21, and the free marginal portionsof the fabric and spring strips are disposed in juxtaposed relation whenassembled. In the drawing I have exaggerated the thicknesses and alsothe bulge of the bight portions, merely for clearness of illustration.

In actual practice the bight in cross section is about one-eighth of aninch and the balance of the wiper merely totals the actual thickness ofthe felt and spring. In fact, and as will presently appear, it is notnecessary, in the preferred form, to have a full rounded bight becausethe apex of the bight does not engage the cylinder wall when the wiperis proportioned to extend beyond the working face of the honing bar.

When the spring wiper is assembled With the spring fitting snugly withinthe wiper, the inner free marginal portions are disposed along side bar20, as shown in Fig. 3, and the separate sections of the holder Il arepressed together causing the gripping walls !3 to grip the bar 20 andalso` grip the free marginal portions of the wiper and spring againstone side of the bar, and when the parts are thus disposed the sectionsof. the holder are "spot" or "butt" welded in permanent relation and asa unitary structure. Of course, it would be within the scope of theclaims to employ screws or like means to compress and hold the sectionsbut I employ welding as a more efficient method.

Now it will be clear that the major length, or rather height of thewiper, is free to bend and flex responsive to the thrust imposed byengagement with the wall of the cylinder, as will later be described.

In Fig. 6, I have shown the same form of holder and bar with the samereference numerals and the same type of wiper having a double thickness.However, the spring consists of a single thickness strip 28, the outerend 29 being curved over to form a spring bight supporting portion. Thefree marginal portions are gripped by wall IS in the same manner as inthe preferred form. However, in the preferred form, as shown in Fig. 3,I can use spring steel that has been tempered, while in the form shownin Fig. 6, it is necessary to anneal the rounded portion 29.

I have shown in Fig. 9 a further modification of. the sustaining springfor the wiper which consists of a single thickness of spring steel 35with a bight supporting portion 36, formed by bending the spring uponitself to form a fairly blunt end.

While the operation of the mechanism hereinbefore described may be clearfrom the foregoing it will be briefly recapitulated as follows:

In using the device in my own shop I first dip the same into a solutioncommonly known as a solvent, although the same may be water or anyliquid effective for the purpose. This serves mainly to moisten the feltwipers so that they will the more effectively pick up the looseparticles of emery and iron released by the honing bars. However, thisalso makes the honing bars act more elfectively.

The device is then contracted so that the holders IT may be insertedinto the cylinder, whereupon the cam !6 is adjusted to spread the bars20 into engagement with the cylinder wall. At this point I wish to statethat heretolore one. of the holders l'l has carried a non-abrasive barsuch for instance as graphite or like material capable of wiping action.It would of course bc impossible to equip a holder with a yielding wiperas that Would dislocate the equilibrium of pressure on the holderscarrying honing bars. Further, if one holder was equipped with anonabrasive bar the pressure on it, which would necessarily be equal tothe pressure on the abrasive bars, would be so great that it would tendto bLu'y the emery and iron particles in the minute cavities of thecylinder wall instead of collecting such particles Thus the objection toequipping one holder with a collecting material will now be clear.

On the contrary, it will be seen that with the novel device of thisinvention I can equip each holder with a honing bar and thus render themechanism self stable and self centering in the cylinder because of theuniform pressure on each bar, and in addition I can equip one or moreholders With a wiper and thus provide for a wiping function withoutreducing the effioiency of the honing mechanism.

When the holders are expanded or spread, the wipers, if extended beyondthe Working faces of the bars 20, are flexed, as indicated in Fig. 1.This separates the wiper from the honing bar which is a distinctadvantage, because the wiper is then in a better position to pick uploosened particles of emery and iron. It will now be clear that wipingcontact is slightly at one side of the apex of the wiper, and as thehoning bar wears down, an additional area of the limb or side 24 will bebrought into wiping play thereby making the wiping area extendible froman area near the bight apex toward the anchored portion of side 24.Hence, wiping contact will be gradually changed as the bar 20 wears downand therefore the life of the wiper will be extended so that it will bepractically coextensive With the life of the bar 20.

In any event I achieve the great desideratum of a light pressure wipingcontact in contradistinction to a heavy pressure wiping contact. With alight wiping contact the wiper not only lasts longer but I can employ anabsorbent material such as felt that will be far more efficient inpicking up the loosened particles than a hard dense material.

The form shown in Fig. 6, is equally eificient because its spring 28,like the spring in the preferred form, extends to the full radial heightof the wiper so that in both constructions the springs not only act tosustain the wiper against fiexure transversely of the length of thestrips, but the springs, in both constructions, serve to extend thewipers to their full height radially from the holders.

After a cylinder has been treated I have always dipped the device into asolvent so as to free the wipers from accumulations of grit which theyhave collected.

It is believed that my invention will be fully understood from theforegoing description, and I do not wish to be limited thereto except'for such limitations as the claims may import.

I claim:

1. In a cylinder honing and wiping device, means for holding a honingelement, a resilient wiper carried by said means, and mechanism foradvancing said means rotatively in a cylinder With said element andwiper in engagement with the cylinder wall, said wiper initiallyprojecting radially beyond said element and being adapted to yield uponengagement with the cylinder wall and as said element wears down tobring new areas of said wiper into engagement with the cylinder wall.

2. In a cylinder honing and wiping device, means for holding a bar-likehoning element, a fiexible strip-like wiper carried by said means andadapted to ex transversely of its length and being disposed in followingrelation to said element, and mechanism for rotatively advancing saidmeans and holding said element and wiper in engagement with the cylinderWall, said wiper initially extending beyond said element and flexingupon engagement with the cylinder wall dependent upon the extent towhich said element wears.

3. In a rotary honing and wiping device for cylinders, a holder having ahoning bar, a flexible wiper disposed in following relation to said barwith respect to the direction of rotation and comprising a length offabric folded to form a double thickness strip with the bight thereofextending radially beyond the bar and a radially inner area of the stripfacing the bar and forming an extendible wiping area dependent upon theextent .of flexure of said strip, a length of spring sheet steel foldedto form a spring strip and disposed within said wiper strip toresiliently support the latter and the bight of said spring stripengaging the bight of said fabric strip, the free side margin of saidfabric and spring strips remote from the bights thereof being gripped bysaid holder against said element leaving the remainder of said wiperfree to fiex, and mechanism for rotating said holder with said bar andwiper engaging the Wall of said cylinder.

4. In. a rotary honing and wiping device for cylinders, a holder havinga honing bar, a flexible wiper comprising a length of fabric folded toform a double thickness strip substantially coextensive in length withsaid bar and initially extending radially beyond said bar with the bightof said strip and a radially inner area thereof facing said bar andforming an extendible wiping area dependent upon the extent of flexureof said strip, a spring steel strip disposed within said wiper strip andhaving a rounded portion engaging the bight of said wiper strip andresiliently supporting the latter transversely of its length. the innermargins of said spring and wiper strips being anchored to said holderleaving the remainder of said wiper free to flex, and mechanism forrotating said holder with said bar and wiper engaging the wall of thecylinder.

5. In a rotary honing and wiping device for cylinders, a holding meanshaving a honing bar, a flexible wiper strip comprising a length offabric folded to form a strip substantially co-exten sive in length withsaid bar and a portion of the bight of said strip being adapted forengagement with the cylinder wall, a spring strip in said wiping stripfor resiliently supporting the latter in wiping engagement with thecylinder wall, the inner margins of said spring and fabric strips beingconnected with said holding means leaving the remainder of said wiperfree to flex, and mechanism for rotating said holding means with saidbar and wiper engaging the cylinder wall.

6. In a rotary honing and wiping device for cylinders, a plurality ofholders each having a honing element, propulsive mechanism for spreadingand rotating said holders to engage said elements with uniform pressureagainst a cylinder wall, and each of said holders having a wiper forengagement with the cylinder wall with the wipers in following spacedrelation to their respective holders and in preceding relation tofollowing holders with respect to the direction of rotative travel ofsaid holders.

'7. In a cylinder honing and wiping device, a radially outwardlydisposed mount, a honing element and a wiper fixed to said mount andsaid wiper being a relatively thin flexible strip of fabric, a stripspring carried by said mount and extending laterally of said wiper toyieldingly support the latter in an extended radially outward position,and centrally disposed mechanism for advancing said mount in a cylinderwith said honing element and wiper in engagement with the cylinder wall.

8. In a honing and wiping device, a mount comprising an outwardly facingchannel member, a bar of abrasive material secured therein, a foldedstrip of non-abrasive material having itsfree edges secured in saidmember and the bight of said folded strip extending beyond said bar, and

a leaf spring inside said folded strip and having its inner edge Securedin said member and said spring extending toward the bight of said stripfor yieldingly supporting the latter in an extended position.

9. In a honng and wiping device, a mount having outwardly disposed meansfor securing thereto in projecting relation therefrom a bar of abrasivematerial and a relatively thin strip of nonabrasive material, and saidbar and strip being abreast of each other and said strip extendingoutwardly beyond the effective face of said bar, and a spring Secured bysaid means and extending outwardly therefrom for yieldingly holding saidstrip in an extended position.

GEORGE C. BECK.

